 //4 6 11 9 余4
        
 Array.prototype.axuan = function(arr){
    var tmp = new Array(...arr);
    var tmp2 = JSON.parse(JSON.stringify(tmp));
    // console.log(tmp2);
    var index = 0;
    var lasttmp;
    for(var i = 0;i<tmp2.length-1;i++){
        // console.log(i,'+++----');
        // console.log(i+1,'*****');
        // console.log(tmp[i],'****))');
        if(tmp[1]>tmp[0]){
            // console.log(i+1,'ggkkk');
            // console.log(tmp[i+1],'------');
            tmp.splice(0,1);
            // console.log(tmp,'你好啊')  
            index++
            // console.log(index,'lll')
            // Array.prototype.axuan(tmp)
        }else{                   
            tmp.splice(1,1);
            // console.log(tmp,'我就是你的')  
            // console.log(111);
        }
    }
    let tally = tmp.join('')*1
    return tally
}
// console.log(arr.axuan(arr),'我是真正的王');